Hi Johanna,
What you are feeding is not necessarily bad for your discus.. especially since its a variety. I would not worry overly about it.they would be good additions to the dry menu, which now consists of Tetra Discus granules, Tetra Pro Color Crisps, Sera Discus granules (they are too small and fast sinking, mostly get eaten by plecos), Prodac Colour flakes and Dajana Discus flakes.
Bug bites are hit or miss with discus .. mine would not touch them..
If I could give you a suggestion.. when you are introducing a new food or trying to train them to eat a different food you have to feed only that food. Even if they dont eat it with gusto or at all a few days.. most of the time hobbyists worry their fish will starve to death if they go without eating a few days so they give in and stop feeding the new food. People go away a week to 10 days and dont feed their discus at all. That gives you an indication of how long you can try with a particular food you want them to eat.
Hth,
Al